CRI, acronym of Colour Rendering Index, is a measure of a light source's ability to accurately reproduce the colours of objects that it illuminates. A high CRI means that the colours of objects will appear natural and true to life under the light source, while a low CRI can cause colours to appear distorted or washed out. For interior lighting, a high CRI is important to ensure that the colours of the furnitures, wall, decorations and other objects are accurately reproduced. This can help to create a pleasant atmosphere in a space, and can make it easier to match colours and fabrics when decorating. When choosing light sources for interior lighting, it is important to consider the CRI. Good quality LED lighting often has a high CRI, making it a good choice for creating a natural and appealing lighting environment.